Derrick pivot connection.



A. LAMBERT. DERRICK PIVOT CONNECTION.

APPLICATION FILED NOV. 12, 1909.

Patented Aug. 16,1910.

3 SHEETS-SHEET 1.

A. LAMBERT.

v DERRICK PIVOT CONNECTION. APPLIOATION FILED NOV. 12, 1909.

Patented Aug. 16, 1910.

a SHEETS-SHEET 2.

E-IE:

A. LAMBERT. DERRICK PIVOT CONNECTION.

APPLICATION FILED NOV. 12, 1909.

Patented Aug. 16, 1910.

3 SHEETS-SHEET 3.

asnnn LAMBERT, or NEWARK, NEW JERSEY.

Dannie]: rrvo'r connnorron'.

Specification of Letters Patent.

Patented Aug. 16, 1910.

Appllctitidi men November 1%, 1909-. Serial No. 527,612.

To all whom it may concern:

Be it known that T, ASHER LAMBERT, a citizen of the United States,residin at 1 Johnson avenue, Newark, county of ssex, and State of NewJersey, have invented certain new and useful Improvements inDerrickPivot Connections, fully described and represented in the followingspecification and the accompanying drawings, forming a part of the same.

This invention relates to that class of derrick in which a post issupported at the top by guys or braces and has a jib jointed thereto tobe raised and lowered by suitable hoisting apparatus the jib also suporting the hoisting-pulley, and the ropes f dr operating the jib andthe hoisting-pulley being carried through the lower pivot of the postand thence horizontally over a sheaveulley so as to operate freely whenthe 0st 15 turned in various directions by its bul -wheel. The post inthe present invention may be made of solid wood as the pivots are at oneside of the post so that theihoisting-ropes are not required to passthrough the post at any point. 1

The invention furnishes an improved construction for the pivot-pin atthe top of the post which makes the pin readily renewable and providesit with a wearing sleeve where the eyes of the braces fit upon it. Thesleeve is preferably made long enough to receive the eyes of threebraces and has a reversible collar upon the top adapted to cover theupper third of the sleeve when only two braces are applied thereto.

The invention also provides an improved metal base to en port the postwhich renders the bottom s cave-pulley more accessible by placing itabove the sills instead of between them, as is common; and such base isrovided with a stepwhich is removable and renewable when worn orcracked.

The invention will be understood by reference to the annexed drawing, inwhich- Fi re 1 is an elevation of a derrick provide with theimprovement; vFig. 2 1s a planet the upper pivot-attachments; Fig. 3 1sa side View of the'same parts with the sleeve, the eyes and collar uponthe pivotpin in section at the center line where hatched, Fig. 4. is afront view of the pivotattachments with the collar upon the pivotpinadjusted to receive two eyes; and Fig. 5 shows the upper end of thepivot-casting and through the plate It and the the, pivot-castingsecurely t ereto. The

pivot-pin with the collar reversed to receive three eyes. Fig. 6 is afront view of the pivot-casting and the pin laid therein. Fig. 7 is aplan, and Fig. 8 a sectional elevation of the base and step for thederrick. In Fig. l, a designates the post, b the Cjib pivoted to thebottom of the same, an 0 one of the braces having an .eye 03 fitted tothe. pivot-pin e on top of the post. The hoisting-sheave f is shownoperated by a hoisting-rope f and the jib is raised and lowered by arope g. The fixtures for the ivot-pin e consist of a pivot-castinghaving a plate 7t fitted to one side of the post a, and an extension 2'of such late resting upon the top of the post. T e plate also hasflanges l2. embracing opposite corners of the post. A grooved seat isformed upon the face of the plate 71. to receive one side/of the pin 6,and a grooved cap is fitted to the outer side of the in andprovided atits upper end with ho ting lugs 1 having bolts m extended'through thesame into. the plate It. The heads of these bolts are sunk in recesses mupon the inner side of the said plate. The lower part of the cap isunprovided with bolting-lugs but is provided vwith a projectinglug 11.having flat sides to receive two frame-bars n which carry the sheave 0'for the jib hoisting-rope g A bolt p is inserted through the frame-bars'n and the lug n, and secured by linch-pins p or other suitable means. Astaple-bolt bent into Ushape with a loop 9 at one end, and two legs 9 isfitted throu h holes extended transversely through the ug 12. above andbelow the bolt p, and through-holes e in a pivot-pin e, holes 9 in theplate it and oles a in the post, the legs 9' of this staple-boltprojecting suificiently from the post for the ap licatlon of awasher-plate r and nuts 8. olts t are also inserted osts to lock loop ofthe staple-bolt surrounds the metal through which the sheave-bolt p isextended and thus strongly supports such bolt, while it also secures thepivot-pin in place, by clamping the cap firm y to the post and by itspenetration through the pivot-pin. This connection of the pivot-pin tothe pivot-castin permits the pin to be firmly secured wit out boring anysocket in the casting or turning the pin to fit therein, and

thus permits the pin to be made and fitted sage of the ropes.

to the casting very cheaply. To prevent wear of the pin and thus avoidits renewal, it is provided above the top of the pivotcasting with abushin u which is prefer.- ably made of steel-tub1ng slipped over thepin, and of'suflicient height to receive more than two of the eyes d, d,in case three braces are desired. The sectional view in Fig, 3 clearlyshows this construction, with a collar '0 fitted removably to the top ofthe pin and heldin place by a through-bolt 'v. The collar is formed uponone end with an annular socket or recess w adapted to cover one-third ofthe sleeve u. When the recessed end of the collar is fitted over thesleeve as shown in Figs. 3 and 4, the sleeve is exposed sufliciently toreceive two of the brace-eyes d, d, but the collar may be reversed as,shown in Fig. 5, thus throwing the socket upward and exposing all of thesleeve so as to receive three braces, as shown in that figure.

The base for the bottom of the osts consists of a ribbed box castingaving a foot B fitted to the tops of two angularly arranged sills 'A, A,shown in Figs. 1 and 7, which sills are united-at a right anglebelow'the post and extended backwardly to receive the feet of the bracesc. The base has the two sides C of the box extended upwardly from thefoot to carry, the horizontal pivot D of the sheave-pulleys E whichguide the derrick-ropes. The sides lie close to the sheaves so as tostiflly support their pivot D. A seat F is cast on top ofthe side-platesC and is formed with acentral rope-aperture G. The inner edges of thesheaves lie beneath such aperture as shown in Fig. 7. A step H is fittedto the seat and has a boss H- to center it in the a erture Gr,- and thesocket H to receive the ower pivot of the post. The step has a centeropening I for the pas- The bolts J secure the ste detachably upon thetop of the base, which permits the removal and renewal of the step whenre uired. The base has u right stiffening ribs C at the sides of t eplates C, and its foot B has flanges B fitted to the outeredges ofthesills A, A, to resist the side thrust of the 0st, and the foot isalso secured to the sills. y bolts B It has been common to support thestep upon two adjacent beams resting upon the sills, with side-platesextending downward from the ste to carry the pivot of the sheaves; butin such .case the contiguity ofthe two beams to the side-plates. reventsaccess to the pivot of the sheave-pu eye, and thus rendersit impossibleto remove or renew themwithout taking down the derrick. With theimproved base shown in Figs. 7 and 8, the wet of the sheaves is locatedabovethe si ls and can be readily removed so as to renew the sheaveswhen required, to

lubricate the same, or torenew them when which is liable to rapid wear,to be renewed without renewing the side-plates or any other parts of thebase. It also preserves the ad uStment of the base and sheave-pulleys uon the sills, as neither requires to be distur ed or detached whenrenewing the step.

Having thus set forth the nature of the invention what is claimed hereinis:

1. The combination, with a central derrick-post, of a pivot-castingsecured upon one side of the same at the top and having a verticalgroove, a pivot-pin fitted to such groove, and a cap secured u on thepivotcasting to hold, such pin detac ably in place.

2. The combination, with a derrick-post, of a pivot-casting secured uponone side of the same at the top and having a vertical groove, apivot-pin fitted to such groove, a grooved cap secured to thepivot-casting over the pin and provided with a sheaveframe bolt for theattachment of a sheaveframe, and a staple-bolt having its legs extendedthrough the cap, the pivot-pin, the pivot-casting and the post, and itsloop embracing the sheave-pin lug.

3. The combination, with a derrick-post, of a pivot-casting secured uponone side of the same at the top and having a vertical groove therein, apivot-pin e fitted to such groove, a grooved ca fitted over the pin andhaving bolt-lugs upon its upper part and flattenedupon its lower art toform a lug n for a transverse sheaveame bolt, the bolt 2 insertedthrough such lug, with the sheave-frame n jointed thereon, and thestaple-bolt having its legs 9 extended through the lug, the pivot-pin,the pivotcasting and the post, with washer and nuts upon' their ends,the loop of the staple-bolt embracing and strengthening the lug wherethe transverse sheave-frame bolt is inserted.

4. The combination, with a derrick- 0st,

of apivot-casting secured upon one si e of the same at the top, apivot-pin secured detach-ably upon the outer side of such casting, and awearing sleeve fitted to such pivot-pin abovethe top ofthe castin 5. Thecombination, with a derric 0st of a pivot-casting secured upon one si eoi the same at the top, a pivot-pin secured deof a step, and a metallicbase separate from the step and adapted to support the step above thesills and having a pivot above the sills for the pulley-sheaves.

7. The combination, with a derrick- 0st and sills jointed beneath thebottom 0 the 10 pulley-sheaves journalecl upon the same be-" tween theside-plates, and the seat F upon the side-plates with the ste H secureddetachably thereon by bolts In testimony whereof I have hereunto set myhand in the presence of two subscribing 15 Witnesses.

ASHER LAMBERT. Witnesses THOMAS S. CRANE, Rom. L. HATFIELD.

